111 lines
3.8 KiB
VB.net
111 lines
3.8 KiB
VB.net
#Region "Microsoft.VisualBasic::d6a6fde3105e3657661aac7c370b9657, Microsoft.VisualBasic.Core\Extensions\Collection\Linq\JoinExtensions.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module JoinExtensions
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'
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' Function: IteratesALL, (+2 Overloads) JoinIterates
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Runtime.CompilerServices
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Namespace Linq
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<HideModuleName>
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Public Module JoinExtensions
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''' <summary>
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''' Iterates all of the elements in a two dimension collection as the data source
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''' for the linq expression or ForEach statement.
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''' (适用于二维的集合做为linq的数据源，不像<see cref="Unlist"/>是进行转换，
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''' 这个是返回迭代器的，推荐使用这个函数)
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''' </summary>
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''' <typeparam name="T"></typeparam>
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''' <param name="source"></param>
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''' <returns></returns>
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'''
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<DebuggerStepThrough>
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<Extension>
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Public Iterator Function IteratesALL(Of T)(source As IEnumerable(Of IEnumerable(Of T))) As IEnumerable(Of T)
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For Each line As IEnumerable(Of T) In source
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If Not line Is Nothing Then
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Using iterator = line.GetEnumerator
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Do While iterator.MoveNext
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Yield iterator.Current
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Loop
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End Using
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End If
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Next
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End Function
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''' <summary>
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''' First, iterate populates the elements in collection <paramref name="a"/>,
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''' and then populate out all of the elements on collection <paramref name="b"/>
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''' </summary>
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''' <typeparam name="T"></typeparam>
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''' <param name="a">Object collection</param>
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''' <param name="b">Another object collection.</param>
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''' <returns></returns>
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<Extension>
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Public Iterator Function JoinIterates(Of T)(a As IEnumerable(Of T), b As IEnumerable(Of T)) As IEnumerable(Of T)
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If Not a Is Nothing Then
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For Each x As T In a
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Yield x
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Next
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End If
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If Not b Is Nothing Then
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For Each x As T In b
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Yield x
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Next
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End If
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End Function
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<Extension>
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Public Iterator Function JoinIterates(Of T)(a As IEnumerable(Of T), b As T) As IEnumerable(Of T)
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If Not a Is Nothing Then
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For Each x As T In a
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Yield x
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Next
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End If
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If Not b Is Nothing Then
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Yield b
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End If
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End Function
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End Module
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End Namespace
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